A candidate earns attention by making a precise, testable addition to the closest existing method. The same standard applies to diagnosis, water protection and membrane design.
The focused reference list contains 24 sources. The complete program register contains 63 overlapping records, including the qualification findings below. It identifies useful methods and limitations; it does not establish project performance, novelty or commercial feasibility.
How we choose a sound test
Choose the useful service first.
A feed assay and an intended water or material use determine the treatment and quality tests. Low conductivity cannot demonstrate removal of all source-specific contaminants. Reuse applications and cooling systems need requirements beyond salt removal. S01 S06 S07 S08
Count all water and material flows.
Water used for reagents, washing, cleaning, cooling and finishing can erode the benefit of high feed recovery. Count internal recycle once, include changing inventories and quantify rejects and target losses. Mineral-product claims need a real functional specification, not only a purity headline. S10 S11 S13 S14
Waste heat still needs a useful source and sink.
Thermal treatment must compete on equal cooling duty and accepted-water service, with pumps and cooling included. Record thermal and electrical energy separately. A model or a laboratory heater does not demonstrate a working industrial installation. S09 S15 S20 S22
Use established methods as serious comparisons.
Feed-appropriate seeded precipitation, batch RO, independent membrane-quality checks and weather-adaptive atmospheric harvesting provide relevant precedents. Whether the project offers an improvement remains a question for a fair test. S02 S03 S04 S05 S16
Treat material recovery and reuse as conditional opportunities.
Select one measurable target and include regeneration, finishing, losses and residual costs. Show economics with no mineral sales first. Consider reused components only after integrity and service qualification; conversion to NF/UF changes a membrane’s duty. S10 S12 S17 S18 S19 S21
Choose one first study with a host
A is the first candidate where a suitable brackish gypsum concentrate, scientific lead and laboratory are available. F is an alternative where an appropriately equipped membrane-distillation host is available. E remains conditional on a defined material target and full regeneration balance. B needs useful operating data. C/G need source-and-sink screening before a rig. D needs target inventory and an intended material use. H remains a separate application. This ordering is a project judgment, not a conclusion supplied by a paper or a commitment to fund one option.
Research requirements for each study
A · Diagnose the cause of mineral buildup
Candidate decision-method contribution; novelty unresolved. Proposed work; no experimental result is assumed.
The unresolved question
Can separate tests of process liquid and reused gypsum seeds choose corrective actions more economically than calibrated crystallization kinetics and a tuned operating rule?
What earlier work establishes
Antiscalant removal, seeded precipitation, seed reuse, kinetic diagnosis, dual-probe monitoring and seed attrition have precedents. The proposed contribution is the incremental value of a specific crossed assay in an operating decision. N03 N04 N05 N06 N07 N08 N09 N10 N11 N01 N02
The comparison
- C0: tuned host treatment and seed-management rule
- C1: calibrated kinetics and practical seed-state rule
- T: C1 with the crossed liquid/seed assay
A crossed liquid-by-seed response informs a frozen action table. Its own water, analysis, delay and handling costs are charged to the proposed policy.
What determines the decision
Operating burden per qualifying volume of treated concentrate at matched throughput, plus downstream RO compatibility.
72 development assay vessels; 36 confirmation campaigns of three decision cycles; 216 diagnostic vessels within the proposed-policy campaigns; 18 downstream RO compatibility runs. 1,368 principal panel equivalents.
Before confirmation
A gypsum-limited brackish RO concentrate, interpretable liquid/seed reference assay, different feasible best actions, and a qualified host are required.
Research question, prior art and full methods
B · Make reuse decisions reliable
Candidate control contribution; novelty unresolved. Proposed work; no experimental result is assumed.
The unresolved question
Does a consistency check across flow, pressure and salt measurements improve accepted-water operation under unseen faults beyond a tuned normalization-based controller?
What earlier work establishes
RO normalization, predictive maintenance and automatic quality diversion are established. A prediction score or the use of AI is not the proposed contribution. N01 N02 N09 N12 N32 N33 S06 S07
The comparison
- C0: tuned operating rules
- C1: mechanistic, normalization-based control with fault fallback
- T: C1 plus the prespecified joint consistency rule
A frozen joint consistency rule decides whether the controller can trust its state estimate or must use a conservative fallback.
What determines the decision
Qualifying delivered water per calendar operating time under the same quality and resource limits.
18 development runs and 54 held-out confirmation runs across three controllers, three challenge families and six feed/time blocks; 288 principal panel equivalents.
Before confirmation
A defined reuse service, authorized operating data, independent nonsalt quality methods and representative fault opportunities are required.
Research question, prior art and full methods
C · Find when recovered heat earns its place
Comparative validation and operating-envelope research. Proposed work; no experimental result is assumed.
The unresolved question
Which qualified membrane and source/sink conditions can deliver the same useful water and cooling service at a lower whole-system burden?
What earlier work establishes
Waste-heat desalination and Janus membrane architectures are established. Combined oil/surfactant exposure also appears in later public research; it is not by itself an originality claim. N13 N14 N15 N24 S24 N34 S09 S22
The comparison
- Qualified conventional MD material
- Best feasible electric treatment plus equal cooling service
Measure the boundary at which a material’s stability, absolute throughput, cleaning burden and cooling demand change the preferred process.
What determines the decision
Accepted water and equal cooling service with absolute flux, maintenance, heat and electricity separately accounted.
48 material screens, 72 equal-service comparisons and six 30-cycle endurance campaigns; 972 principal panels.
Before confirmation
Use a measured source/sink envelope, available qualified specimens and a question beyond repeating established material performance.
Research question, prior art and full methods
D · Choose a useful recovery service
Conditional target-specific validation; material novelty not defined. Proposed work; no experimental result is assumed.
The unresolved question
For one native feed and one product or removal service, does the proposed recovery route outperform the strongest conventional route after regeneration, material loss and finishing?
What earlier work establishes
Magnetic sorbents, selective resins, boron pretreatment and magnesium precipitation have precedents. No exact new material composition is supplied or presumed. N16 N17 N29 N30 S23 S13 S14
The comparison
- Best feasible selective resin or precipitation route
- Proposed route at the same native feed and acceptance specification
A target-specific comparison of cumulative qualifying output and total capture/regeneration/finishing burden, including lost support material.
What determines the decision
Cumulative qualifying product or treated volume, with whole-composite and target inventories and complete service cost.
Up to 24 development runs and six campaigns of up to 100 cycles; 2,202 principal panels at the full ceiling.
Before confirmation
Choose one native target, an obtainable material/process and an accepted service specification; complete an element-level comparison before any invention claim.
Research question, prior art and full methods
E · Control the water cost of mineral washing
Candidate operating-rule contribution; novelty unresolved. Proposed work; no experimental result is assumed.
The unresolved question
Does an impurity- and inventory-aware wash/purge rule reduce total external freshwater use on real concentrate beyond optimized conventional recycled or countercurrent washing?
What earlier work establishes
Displacement, recycled-brine and countercurrent washing already exist, including lithium-rich brine patents and industrial practice. Two wash stages alone are not a contribution. N18 N19 N20 N29 N30 S23 S10 S11 S14
The comparison
- B0: strongest optimized conventional wash and purge policy
- T: same selected topology with the proposed inventory/impurity decision rule
On a common wash topology, a frozen inventory/impurity rule selects reuse, fresh makeup or purge while meeting the same product and residual limits.
What determines the decision
Total external freshwater makeup, product qualification, native lithium retention and downstream scale burden.
Up to 42 development runs; 24 confirmation campaigns of ten cycles; 2,820 principal panels.
Before confirmation
A real concentrate/product need, measurable native lithium and complete compatible-fraction balances are required.
Research question, prior art and full methods
F · Protect delivered water during faults
Candidate system-control contribution; novelty unresolved. Proposed work; no experimental result is assumed.
The unresolved question
Does a transport-aware routing rule reduce actual off-spec water entering the accepted tank beyond competent early-warning and diversion controls?
What earlier work establishes
Conductive-spacer wetting sensing, threshold alarms, salinometers, dump valves and persistence delays have precedents. Neither early detection nor automatic diversion is new as a broad concept. N21 N22 N23 N24 N32 N33 S24 N34 S06
The comparison
- C0: optimized conductivity routing
- C1: early sensing plus tuned threshold/persistence and fault fallback
- T: C1 plus a transport/inventory model
A frozen residence-time and contamination-inventory estimate controls routing and safe recovery on matched hardware.
What determines the decision
Absolute off-spec volume accepted, good water diverted and recovery time at the delivered-water boundary.
12 commissioning runs and 108 confirmation runs; 864 principal plus 96 commissioning panels.
Before confirmation
Independent delivered-water truth, calibrated latency/mixing, an equipped MD host and a nontrivial baseline error or good-water-loss opportunity are required.
Research question, prior art and full methods
G · Test the full cooling and water balance
Equal-service integration validation with a conditional control question. Proposed work; no experimental result is assumed.
The unresolved question
When do source interruption, hot sinks and real demand make heat-assisted recovery better or worse than conventional cooling plus water treatment?
What earlier work establishes
Data-center heat-driven desalination, telemetry scheduling, RO preheating and seawater cooling have precedents. Building an isolated coupling is a validation task, not a first-invention claim. N13 N14 N15 N24 S09 S20 S22
The comparison
- B0: best feasible conventional cooling plus treatment
- B1: simpler recovered-heat use, including qualified RO preheating
- T: isolated MD with a prespecified bypass/dispatch rule
Map failure and benefit boundaries at equal cooling reliability and accepted-water service; advance a new controller only if an explicit difference survives existing scheduling prior art.
What determines the decision
Freshwater consumption and auxiliary electricity at equal cooling and delivered-water service, including downtime.
54 six-hour trajectory runs and three paired seven-day campaigns; 288 principal panels across 324 platform hours and 42 configuration-days.
Before confirmation
Actual source/sink and demand traces, feasible host cooling alternatives and an absolute freshwater-saving opportunity are required.
Research question, prior art and full methods
H · Collect water when heat and cooling are limited
Candidate constrained-control contribution; novelty unresolved. Proposed work; no experimental result is assumed.
The unresolved question
Can a controller that accounts for uncertain forecasts and stored moisture avoid wasted regeneration while delivering more qualifying water than a tuned adaptive controller under the same resource limits?
What earlier work establishes
Weather adaptation, condenser control, forecast-assisted energy management and battery-constrained water generation already appear in research and patents. Adding a forecast or heat budget alone is not a defensible novelty claim. N25 N26 N27 N35 N36
The comparison
- C0: tuned fixed timing
- C1: competent weather/condenser-aware, forecast-assisted feasible schedule
- T: C1 plus the registered inventory/uncertainty rule
A prespecified moisture-inventory and uncertainty-aware run/wait/stop rule is compared on equal hardware and forecast access.
What determines the decision
Qualifying collected liquid over complete 24-hour periods at identical heat, electricity and cooling limits.
Nine independent beds and 54 chamber bed-days; six paired field units over two 14-day windows, totaling 168 unit-days; 222 principal water panels.
Before confirmation
An actual sorbent and usable heat grade, climate/resource profiles, a strong adaptive baseline and an unresolved forecast/error decision are required.
Research question, prior art and full methods
What this means for the budget
All eight studies use shared salary, analytical, freight, tax, institutional-cost and reserve rules. Each estimate is a standalone alternative with its own duration and scope. The model includes the C–F allocations below; laboratory methods, material availability and itemized quotes still require confirmation.
Study C: 48 material-screening runs; 72 equal-service comparison runs; six endurance campaigns of 30 cycles. 972 principal analytical panel equivalents. Costs and assumptions.
Study D: Up to 24 chemistry-screening runs; six independent comparison campaigns of up to 100 cycles. 2,202 principal analytical panel equivalents at the full ceiling. Costs and assumptions.
Study E: Up to 42 development runs; 24 confirmation campaigns × 10 cycles = 240 cycles. Capacity for 2,820 principal analytical panel equivalents. Costs and assumptions.
Study F: 12 commissioning runs and 108 confirmation runs: six challenge families × three controllers × six independent coupons. 864 principal and 96 commissioning chemistry panels. Costs and assumptions.
Composition-specific assays, independent reference instrumentation, resin conditioning and challenge consumables have explicit planning allowances. These are unquoted estimates, not assurance that a laboratory will accept the samples at that price. A failed feasibility or precision gate requires a scoped decision before confirmation. No mineral income or equipment donation reduces the estimates. Daniel’s annual gross input is $135,200; concurrent studies must reconcile actual shared effort.
Sources, applications and reading limits
S01–S24 identify the research sources used here. Each record states the application and actual reading limits. Literature findings are not Water From Energy results.
U.S. Geological Survey · Date not supplied; reviewed 2026-09-09
Application: Require feed-specific speciation before choosing a scale intervention.
Reading depth: Official documentation; selected high-ionic-strength example and model documentation read. No project simulation performed.
Limit: Database coverage and measured feed chemistry must be checked; equilibrium does not establish deposition rate.
Shichang Xu; Ping Wang; Lixin Xie; Yawei Du; Wen Zhang · 2024-5-7
Application: Compare competent seeded treatment where feed chemistry supports it.
Reading depth: Selected original methods and indexed sections reviewed.
Limit: Synthetic calcium-sulfate system and short seed reuse; not a universal mixed-brine protocol.
Alexander M. Schwiebert; John A. Bush; Alexandre Bray; Ivan Reyes; Agusberto Cortijo; Hans Portilla; Pablo García-Chevesich; Christopher Bellona; Tzahi Y. Cath; Johan Vanneste · 2024-10
Application: Include a tuned chemistry-based control baseline, conditional on feed.
Reading depth: Original abstract and indexed author-manuscript methods/tables read; complete supplement not audited.
Limit: Simulated agricultural runoff; recycled sequences are not independent feed lots.
Allyson L. McGaughey; Amy E. Childress · 2022-2
Application: Use independent contamination mass and full hydraulic delay as outcome measures.
Reading depth: Current abstract and prior project main-method review used; accessible original retained in watch-sources.
Limit: Bench-cell response and averaging do not validate fast product-diversion control.
Alla Alpatova; Adnan Qamar; Mohammed Alhaddad; Sarah Kerdi; Hyuk Soo Son; Najat Amin; Noreddine Ghaffour · Date not supplied; reviewed 2026-09-09
Application: Require incremental benefit from quality routing beyond the established sensor.
Reading depth: Original abstract/introduction only; full methods and supporting information unavailable.
Limit: Sensor architecture precedent only; no verified operating recipe or delivery benefit.
E. Mercer; C. Davey; Y. Bajón Fernández; S. Septien; S. Tyrrel; E. Cartmell; M. Pidou; E. J. McAdam · 2024
Application: Make the quality panel source- and use-specific; conductivity alone is insufficient.
Reading depth: Original abstract and indexed article sections read; full PDF retrieval returned HTTP 403.
Limit: Blackwater matrix and pH-dependent contaminant behavior cannot be transferred directly to seawater.
U.S. Environmental Protection Agency · Date not supplied; reviewed 2026-09-09
Application: Obtain the intended user requirement before selecting treatment endpoints.
Reading depth: Current official industrial-reuse page and basic reuse guidance read.
Limit: Guidance is not a site permit or a complete jurisdiction-specific water specification.
Centers for Disease Control and Prevention · 2025-1-3
Application: Include microbial, corrosion and aerosol management in a host-approved cooling-water specification.
Reading depth: Official cooling-tower toolkit module, dated 3 January 2025, read.
Limit: Health-management guidance; this review does not design or approve a microbial challenge study.
Marco Malaguti; Matteo Morciano; Giulia Viano; Andrea Achilli; Aamer Ali; Cejna Anna Quist-Jensen; Alberto Tiraferri · 2026-6
Application: Count cooling, circulation and heat opportunity cost on an equal-service basis.
Reading depth: Full original PDF retrieved; selected methods, assumptions, results and conclusions read.
Limit: Thermodynamic/model study; illustrative source/sink conditions and ideal permeate are not site measurements.
Giuseppe Scelfo; Giuseppe Battaglia; Michela Cardella; Antonella Filingeri; Andrea Culcasi; Francesco Volpe; Lorenzo Craveri; Erica Bertozzi; Alberto Tiraferri; Giorgio Micale · 2025-11-18
Application: Reconcile reagent and rinse water; rebuild costs rather than import reported profitability.
Reading depth: Full original PDF retrieved; selected process methods, cost boundary, water-balance results and conclusions read.
Limit: Lab-informed modeled scale-up; labor, maintenance and waste-disposal costs omitted from preliminary economic model.
Lorenzo Ventimiglia; Fabrizio Vassallo; Giuseppe Lo Burgio; Antonino Campione; Laura Cammilli; Paolo Vicario; Giuseppe Battaglia; Fabrizio Vicari; Andrea Cipollina; Alessandro Tamburini; Giorgio Micale · 2025-10
Application: Require functional product specifications and measured finishing water.
Reading depth: Prior project main-method review plus current original washing/settling sections checked.
Limit: Short pilot operation; unresolved total wash-water balance, feed-table inconsistency and product-qualification details.
Sun Hae Ra Shin; Praveen K. Thallapally · 2023-11
Application: Report capacity per whole composite and complete material/regenerant losses.
Reading depth: Original report available in project; conclusion checked now, selected methods reviewed previously.
Limit: Core-shell architecture precedent; automated continuous operation remained further work.
Yigang Wang; Sixie Yang; Yiwen Liu; Chang Wang; Hui Pan; Zhenjie Zhang; Ping He; Haoshen Zhou · Date not supplied; reviewed 2026-09-09
Application: Separate gross electricity, coproduct credits and recovered target mass.
Reading depth: Original indexed energy-accounting/results sections read; entire supplement and raw data not audited.
Limit: Small-cell energy allocations and concentration gain are not whole-plant cost or feed recovery.
Sixie Yang; Bo Chang; Chang Wang; Yigang Wang; Zhang Wen; Yiwen Liu; Haoshen Zhou; Ping He · 2026-7-6
Application: Use target-free blanks and collect target mass from every process location.
Reading depth: Full original HTML retrieved; selected extraction/control and particle-collection methods/results read. Crossmark record inspected.
Limit: Small simulated-seawater experiment; fine-particle capture, inventory origin and pressure effects require careful interpretation.
Zhen Yu; Can Ge; Zhengyi Mao; Ying Li; Sihan Tang; Kunwei Li; Fenghui Duan; Jian Lu · 2026-9-1
Application: Add integrated heat/mineral harvesting to the prior-work comparison; do not reuse headline yields or costs.
Reading depth: Full original HTML retrieved; selected design, practical tests and methods read; supplement not obtained.
Limit: Spiked-feed cycle tests differ from outdoor real-water tests; economic lifetimes and allocation are assumptions.
Husam A. Almassad; Rada I. Abaza; Lama Siwwan; Bassem Al-Maythalony; Kyle E. Cordova · Date not supplied; reviewed 2026-09-09
Application: Use a competent adaptive baseline and separately meter useful liquid, heat and electricity.
Reading depth: Full original HTML retrieved; selected device, control, energy and empty-bed methods read.
Limit: Different sorbent and powered cooling; tested conditions are not local annual performance.
Raquel Garcia-Pacheco et al. · 2022
Application: Screen qualified used modules as a later material-reuse option; preserve membrane-lot comparability in primary studies.
Reading depth: Original abstract and indexed methods read; complete results and supporting data not audited.
Limit: Historical operating comparison is not a randomized matched new-versus-used trial.
Jorge Senán-Salinas; Raquel García-Pacheco; Junkal Landaburu-Aguirre; Eloy García-Calvo · 2019-11
Application: Compare like-for-like service, chemical burden and residuals before claiming environmental or cost savings.
Reading depth: Original abstract/preview only; full methods unavailable in this review.
Limit: Conversion changes membrane duty; historical economics depend on chemical use, energy, permeability and scale.
Asya Drenkova-Tuhtan; Michael Schneider; Matthias Franzreb; Carsten Meyer; Carsten Gellermann; Gerhard Sextl; Karl Mandel; Heidrun Steinmetz · Date not supplied; reviewed 2026-09-09
Application: Select one target and a useful separation service; magnetic collection alone is not novelty.
Reading depth: Original institutional abstract screened; complete pilot methods not audited.
Limit: Target-spiked wastewater and a phosphate-specific sorbent; not validation for all brine minerals.
C. Morgante et al. · 2024
Application: Compare with established integrated treatment and do not count related reports as independent replications.
Reading depth: Original institutional abstract and indexed pilot-method sections read; complete integrated operating dataset not audited.
Limit: Pilot units with limited operating hours; possible shared project/feed lineage with other brine-recovery papers.
Giovanni Virruso; Calogero Cassaro; Fabrizio Vassallo; Antonia Filingeri; Alessandra Pellegrino; Alessandro Tamburini; Andrea Cipollina; Giorgio D. M. Micale · 2025
Application: Keep purchased-versus-regenerated reagent comparison as a conditional stage gate.
Reading depth: Original publisher preview only; complete methods unavailable.
Limit: Pilot chemical-recovery precedent; no verified project-specific reagent purity, water use or energy number.
Margaret G. O’Connell; Neha Rajendran; Menachem Elimelech; Jack Gilron; Jennifer B. Dunn · 2024-11-18
Application: Compare complete trains and residual outlets; maximum recovery is not the only optimization objective.
Reading depth: Original selected methods, assumptions and discussion read; code and supplement not reproduced.
Limit: Modeled process trains; crystallizer heat recovery and simplified fouling/cost assumptions limit direct transfer.
S23 · Boron extraction using selective ion exchange resins enables effective magnesium recovery from lithium rich brines with minimal lithium loss
Bonin; Deduytsche; Wolthers; Flexer; Rabaey · 2021 · DOI 10.1016/j.seppur.2021.119177
Selective resin pretreatment reduced estimated lithium loss during magnesium precipitation in lithium-rich salt-lake brine. Lithium loss was inferred from cake moisture, not a complete analytical balance. Ten resin cycles were tested. The optimized regeneration included 7.5 bed volumes of rinse water per 3.5 bed volumes of brine charged: approximately 2.14 L/L by calculation, excluding reagent-solution water and other water demands. This is not a plant water-intensity measurement.
Study application: D and E require direct lithium assays, a competent resin/precipitation comparator, native-feed validation and total regeneration/wash-water accounting. The reported purity and lithium-loss values are not performance assumptions for SWRO concentrate.
Reading depth: Main paper and all main figures reviewed. Supplement not obtained.
Read the free repository PDF
S24 · Novel Janus Membrane for Membrane Distillation with Simultaneous Fouling and Wetting Resistance
Huang; Wang; Jin; Lin · 2017 · DOI 10.1021/acs.est.7b02848
A hydrophilic coating over an omniphobic support resisted the separate short oil-fouling and surfactant-wetting tests. Combined oil/surfactant exposure was not demonstrated. Initial flux was 14.1 versus 34.1 L m⁻² h⁻¹ for the conventional hydrophobic comparison at the stated test conditions, so normalized stability alone obscures a throughput tradeoff. The supplement logged conductivity at two-minute intervals; it is not evidence for a fast diversion controller.
Study application: C qualifies materials before an equal-service heat comparison; F separates oil fouling from genuine leakage and independently validates routing time. Long-term cleaning, real-feed performance, release of coating constituents and full water/energy costs remain project tests.
Reading depth: Main paper, all main figures, and supporting information S1–S5 reviewed.
Read the free repository PDF · Read the supporting information
